Chables e



c. E. POST AND P. e. WAGNER.

LIQUID S uAP DISPENSER.

APPLICATION FILED 00125. I916.

Patented Oct. 28, 1919.

0v vaw rams:

C Mil f .5 [I P05 7'' ments in Liquid-Soap Dispensers,

the following is a specification.

UNITED STATES PATENT OFFICE.

CHARLES E. POST A121) PAUL G. WAGNER, OF LOS ANGELES, CALIFORNIA.

LIQUID-SOAP DISPENSER.

To all whom it may concern:

Be it known that we, CHARLES E. Pos'r and PAUL G. WAGNER, citizens of the United nia, have invented new and useful Improveof which Our invention relates to a soap dispenser and particularly pertains to a contalner from which liquid soap may be dispensed.

The object of our invention is to rovide a container for liquid soap or any or desired liquid which is equipped with simple and eflicient means entirely devoid ofvalves and delicate operative parts and which may be readil composed o non-corrodible materials w erehy a redetermined volumeof liquid will be disc ar'ged at each 0 oration and which will be entirely non-lea ing between the intervals of operation, and which may readily be filled at any time without disturbing the operating mechanism thereof.

The invention is illustrated, b way of example, i'n the accompanying rawmgs in which:

Figure 1 is a view in vertical cross section as seen through the reservoir and particularly discloses the detail construction of the measuring valve and the actuating mechanism therefor.

Fig. 2 is a view in horizontal section and elevation as seen on the line 2 --2 of Fig. I viewed in the direction of the arrows.

Fig. 3 is a view in horipontal cross section as seen on the line 3-3 of Fig. 1 and particularl illustrates the construction of the nozzle lling chamber and the nozzle openlug communicatin therewith.

I ig. 4 is aview 1n side 'elevatlon illustrating, upon a small scale theassembled soap dispenser and support therefor.

Referring to the drawings more particularl 10 indicates a soap reservoir which is pre erably formed of a vitreous or other non-corrodible material, such'as glass. The reservoir is preferably pear-shaped, having its small end exte hi5 downwardly, as particularly shown i 1g. 1 of the rawings. Mounted .over the lower end of the reservoir is a combined measuring and dispensing valve 11 which is formed with a valve cylinder 12 extending upwardly into the open endof the reservoir and having a flange 13 adapted to bear againsta packing washer 14 interposed between the end Specification of Letters Patent.

Patented Oct. 28, 1919.

Application filed October 25, 1918. Serial No. 127,684.

of the reservoir and the upper face of said flange. Detachahly secured beneath the cylinder 12 is a discharge nozzle 15 which is formed of non-corrodible material, which provides an outlet for the liquid soap within the reservoir. This nozzle is formed with a central bore 16 which is counter-bored at its upper end to form a nozzle supply chamber 17. The lower end of the bore 16 is reduced in diameter and communicates with a small outlet duct 18 leading into a spherical antidrii orifice 19 from which the liquid soap 1s ischarged or dispensed. The cylinder 12 and the nozzle 15 are held'in position upon the lower end of the reservoir by a union nut 20 which engages suitable threads formed upon the reservoir and the union nut is screwed into a supporting ring 21.

Reciprocally mounted for movement through the bore of cylinder 12 and into the nozzle bore 16 is a plunger or piston 22 which is fitted with a removable packing covering 22 adapted to maintain a close ht within the bores through which it moves. This piston is preferably threaded upon the end of a plunger rod 23 which extends upwardly through the reservoir 10 and terminates within a top-cap 24-. The upper end of the plunger rod 1s provided with a spring washer 25 beneath which a coil spring 26 is positioned to bear upon a packing washer 27 mounted within a chambered recess 28 formed as a part of a lid 29 by which the receptacle is closed. A stop-collar 30 is fixed to the plunger rod 23 beneath the face of the recess, thereby limiting the upward movement of the plunger as actuated by the spring 26. The lid 29 is adapted to rest upon a packing washer 31 and is held within a sleeve 32 screwed upon the reservoir 10, by means of a lock-ring 33 which in turn is held in place by the top-cap 24 threaded to the outer periphery oi thesleeve 32.

As a means for actuating the plunger rod 23 a push button 34 is provided and mounted upon a secondary plunger rod 35 which extends through bushing 36 into the top-cap 24 and into engagement with the upper end of the plunger rod 23, thereby making it possible for the plunger rod and press button to move simultaneously when it is desired to obtain soap from the reservoir.

The assembled dispenser may be mounted in a convenient position for operation in any desired manner. In Fig. 4 of the drawings it is shown as mounted upon a horizonmotion.

tally secured bracket 37, integral with the ring 21,-which is held by screws to the face of the wall or other finish boards.

dis nser, the push button 34 is depressedan this in turn will actuate the plunger rod 23 to move the piston 22 in a downward di- Durin the course of the down ward travel of t e lunger, it will pass from the bore in cylintlizr 12 and down to the lower end of the bore 16 of the nozzle. At the same time the quantity of soap within the bore 16 will be forcefully discharged through the duct 18 and may be caught in any desired manner. As the piston 22 is depressed, the soap in the reservoir 10 will ob viously follow the same and as said piston passes through the chamber 17 it primarily displaces a volume of air less than the total piston volume. This is due to the fact that the length of the piston is greater than the depth of the chamber 17. his partial dislacement of air results in air pressure which is first exerted upon the soap in the chamber 16, the upper portion of which becomes partially filled with air before the lower end of the piston closes the upper end of said chamber, the air being thus trapped between the piston and the soap in the chamber 16. This insures a complete emptying of the chamber 16 so that upon the return stroke of the piston there is no resistance to the intake of air and consequently no foaming of the soap due to the passage of 40 thc admitted air in a fine stream through a small body of soap contained in the cham ber 16.

During the downward movement of the piston, soap from the reservoir 10 will follow until the upper end of the piston has passed the lower or discharge end of the passage or cylinder 12.

Further downward travel of the piston causes a partial vacuum to be formed in the chamber 17 thus further forcing continuation of flow of the soap from the reservoir 10 into said chamber 17. i

The return stroke of the piston causes the chamber 16 to become filled with air and as said iston again passes through the cham her 1 it displaces some of the fluid therein and this forces apredetermined volume thereof to pass into the reservoir 10. Normally this fluid will be air but in the event that the piston is forcibly maintained at the lower limit of its movement until the chamber 17 is entirely filled with soap, then part of that soap will be returned to ,the reservoir 10. As the iston approaches and :until and after it reaclies the upper limit ofits movement, air

from the chamber 16 will pass into and substantially fill the chamber 17 while the soap contained in the latter flows into and fills the chamber 16.

It will be seen from the forcgoin that the action of the device is positive an depends in no wa upon vity.

When it is necd s s ilry to refill the reservoir with a soap solution, the to ca 24 carrying the push button is remove y withdrawin the stopper 39, the reservoir may be refiIl ed. Where it is desired to replace the packing on the plunger or to clean the interior of the reservoir, although such cleaning will not be necessary, except at great intervals-for the reason that the parts with which the soa rodible, and t e reservoir is entirely closed, then the lid 29is removed, after taking off the closure ring 33.

The first actuation of the plunger will discharge a full quantity of liquid soap contained 1n the bore 16, but if immediately thereafter the push button 34 is rapidly re ciprocated, little or no soap will be discharged through the discharge orifice. This is'due to the fact that insufiicient time is allowed for the air to bubble up through the liquid soap or for the soap to flow into the nozzle supply chamber. We consider this action of our dispensing device of great ad vantage, as it prevents waste of soap so common with the ordinary'soap dispenser now in use.

It will be understood that various changes in the construction, combination and arrangement of parts may be made by those skilled in the art without departing from the s irit of our invention as defined in the c aims.

Special attention is called to the fact that the soap dispenser may be refilled from time to time without in any way disturbing or removing the piston mechanism and that when the soap dispenser is ready for operation it has no vent except the discharging orifice.

Attention is also called. to the means forming the piston bore and having an enlarged measuring chamber intermediate of the ends of the piston bore, the piston being normally in the upper end of the piston bore, thereby forming a partial vacuum below the piston to prevent leakage through the discharge orifice.

\Ve claim: y

1. A liquid soap dispenser comprising a reservoir having a cylindrical discharge orifice at its lower end, an air chamber be low the same, and a c lindrical container for a predetermined vo ume of soa below said air chamber axially alined with said orifice, the last-named container hawing an unobstructed minute discharge opening, a piston reciprocable and normally disposed come in contact are non-cor in the cylindrical discharge orifice and snugly fitting the same and adapted to be depressed to pass out of the same and into the container to forcibly eject the contents of the latter and at the same time perm-it passage of soap from said reservoir into said air chamber and upon its return stroke permit passage of air from said air chamber into said reservoir, the said return stroke causing air to fill said cylindrical container and pass into said air chamber whereupon soap will flow from the latter into said container to substantially refill the same.

2. A liquid soap dispenser comprising a reservoir having a cylindrical discharge orifice at its lower end, an air chamber below the same, and a cylindrical container for a predetermined volume of soap below said air chamber axially alined with said orifice, the lastnamed container having an unobstructed minute discharge opening, a

iston reciprocable and normally disposed in the cylindrical discharge orifice and snugly fitting the same and adapted to be depressed to pass out of the same and into the container to forcibly eject the contents of the latter and at the same time permit passage of soap from said reservoir into said air chamber and upon its return stroke permit passage of air from said air chamer into said reservoir, the said return stroke causing air to fill said cylindrical container and pass into said air chamber whereupon soap will flow from the latter into said container to substantially refill the same, said piston snugly fitting and substan tially filling said container when disposed therein.

3. A liquid soap dispenser comprising a reservoir having a cylindrical discharge orifice at its lower end, an air chamber be low the same, and a cylindrical container for a redetermined volume of soa below said air chamber axially alined' with said orifice, the last-naimed container having an unobstructed minute discharge opening, a piston reci rocable and normally disposed in the cy indrical discharge orifice and snugly fitting the same and adapted to be depressed to pass out of the same and into the container to forcibly eject the contents of the latter and at the same time permit passage of soap from said reservoir into said chamber and upon its return stroke permit passage of air from said air chamber into said reservoir, the said return stroke causing air to fill said cylindrical container and pass into said air chamber whereupon soap will flow from the latter into said container to substantiall refill the same, said air chamber being 0 larger diameter than said container and of less depth than the length of said piston.

4. A liquid soap dispenser coin rising a reservoir having a cylindrical discharge orifice at its lower end, an air chamberbe low the same, and a c lindrical container for a predetermined vo me of soap below said air chamber axially alined with said orifice, the last-named container having an unobstructed minute discharge opening, a piston reciprocnble and normally disposed in the cylindrical discharge orifice and snugly fitting the same and adapted to be depressed to pass out of the same and into the container to forcibly eject the contents of-the latter and at the same time permit passage of soap from said reservoir into said air chamber and upon its return stroke permit passage of air from said air chamber into said reservoir, the said return stroke causing air to fill said cylindrical container and pass into said air chamber whereupon soap will flow from the latter into said contaiiner to substantially refill the same, said piston snugly fitting and substantially filling said container when disposed therein, said air chamber being of larger diameter than said container and of less depth than the length of said piston.

5. A liquid soap dispenser comprising a reservoir having a cylindrical dischar e orifice at its lower end, an air chamber the same, and a c lindrical container for a predetermined vo ume of soap below said airchambcr axially lined with said orifice,the last-named container having an unobstructed minute discharge opening, a piston reciprocable and normally disposed in the cylindrical discharge orifice and snugly fitting the same and adapted to be depressed to pass out of the same and into the container to forcibly eject the contents of the latter and at the same time permit passage of soap from said reservoir into said chamber and upon its return stroke permit passage of air from said air chamber into said reservoir, the said return stroke causing air to fill said cylindrical container and pass into said air chamber whereupon soap will flow from. the latter into said container to substantially refill the same, said air chamber being of larger diameter than said container and of less depth than the length of said piston, and of approximately equal volume with said conminor.

6. A liquid soap dispenser comprising a reservoir terminating at its lower end in a discontinuous cylindrical discharge orifice comprising two parts separated from each other by an annular air chamber, a piston reciprocable in said orifice and of greater length than the depth of said air chamber, means for manually depressing said piston, a spring for supporting the same and maintaining it normally disposed in said orifice above said air chamber, said piston adapted to substantially fill the lower end portion, of said orifice when depressed and to be then disposed so that its upper end is substantially slow flush with the bottom of said air chamber, there being an unobstructed minute discharge opening in the lower end of the lastnamed portion of said orifice through which the contents of the latter are discharged as said piston enters said part.

7. A liquid soap dispenser comprising a reservoir terminating at its lower end in a discontinuous cylindriea discharge orifice comprising two parts separated from each other by an annular air chamber, a piston reciprocable in said orifice and of greater length than the depth of said air chamber, a piston rod for said piston extending throu b said reservoir and projecting through t 0 top wall thereof, a spring supporting said rod for inaiutainin said piston normally disposed in said ori ice above said air chamber, said piston adapted to substantially fill the lower mid portion of said orifice when depressed and to be then disposed so that its upper end is substantially flush with the bottom. of said air chamber, there being an unobstructed minute discharge opening in the lower end of the last-named portion of said orifice through which the contents of the latter are discharged as said piston enters said part.

In testimony whereof we have signed our names to this specification.

CHARLES E. POST.

PAUL G. WAGNER. 

